I'd recommend Zonal Pro Warmtone Paper Developer for a liquid dev.
It lasts a long time after opening and you can vary the tone thru dilution. It is my favorite warmtone developer.
Ilford RC paper for beginning printing. Pearl is a good comprimise between glossy and matte.
If you are planning on making postcards, Ilford postcard paper might work well with your plans. Although if you don't mind cutting the 5x7 paper down, it would work too.

Congratulations on your new baby! The enlarger too!